• Cong Wang's avatar
    net_sched: defer tcf_idr_insert() in tcf_action_init_1() · e49d8c22
    Cong Wang authored
    All TC actions call tcf_idr_insert() for new action at the end
    of their ->init(), so we can actually move it to a central place
    in tcf_action_init_1().
    
    And once the action is inserted into the global IDR, other parallel
    process could free it immediately as its refcnt is still 1, so we can
    not fail after this, we need to move it after the goto action
    validation to avoid handling the failure case after insertion.
    
    This is found during code review, is not directly triggered by syzbot.
    And this prepares for the next patch.
    
    Cc: Vlad Buslov <vladbu@mellanox.com>
    Cc: Jamal Hadi Salim <jhs@mojatatu.com>
    Cc: Jiri Pirko <jiri@resnulli.us>
    Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    e49d8c22
act_sample.c 8.1 KB